Base for pile-drivers



E. l. STONE.

BASE FOR me mamas.

APPLICATION FILED JUNE 24, I916.

1,304,1 1 Patented May 20, 1919 WITNESSES: 11v VEN TOR.

M J A TTORNE Y ms mmms PETERS co.. PHDTU-LITHD WASHINE mu. 0. c.

EDWARD J. STONE, 0F DULUTH, MINNESOTA.

BASE FOR FILE-DRIVERS.

Specification of Letters Patent.

Patented May 20, 1919.

Application filed June 24, 1916. Serial No. 105,764.

To all whom it may concern:

Be it known that I, EDWARD J. STONE, a citizen of the United States, residing at Duluth, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Bases for Pile- Drivers, of which I do hereby declare the following to be a'specification.

My invention relates to base for pile drivers and has for its object the provision of a base of improved form whereby certain inconveniences resulting from the form of base heretofore used in such structures may be modified or avoided. With this and other objects in view, it consists of the structures, combinations, arrangements of parts and form hereinafter described and claimed.

In the drawings, Figure 1 is a plan view of said base, and Fig. 2, is a side elevation thereof.

Heretofore the base of a pile driver has been constructed with sides diverging from each other from the front to the rear end. The degree of such divergence was governed largely by the necessity of gaining suflicient Width for shear-leg footings intermediate of the forward end of the base, and the position of the hoisting engine near the rear end of the base, and for insuring transverse stability in the vicinity of said footings. In practice, said ."prior form of base is found inconvenient for use on narrow bents of bridges or trestles under construction, and further the great width of the rear end of a base of such form requires that a wide area be cleared of litter and low-lying objects whenever the structure is to be moved longitudinally. In my invention the improved form of the base is of material consequence in that it permits the convenient use of the structure on much narrower bents than would otherwise be the case, and reduces the area from which litter must be removed when moving the structure longitudinally, thus saving time and labor.

In the drawings 1 and 2 are sills or skids secured together in any suitable manner or by any suitable means, as by crossties 3 and diagonal braces 4, and forming the base of a pile driver.

a suitable hoisting engine (not shown). Said sills diverge from each other from a Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Upon said base, near the rear end thereof is positioned the bed 5 ofv transverse intersecting line AB near their forward ends to a transverse intersecting line CD intermediate of the position of said engine-bed and the forward ends of said sills and extend approximately paral-.

lel to each other from said intermediate line to their rear ends. Intermediate of the position of said engine bed and said forward ends of said sills are positioned footings 6, 6, for forwardly and upwardly inclined shear legs 7 for supporting any suitable form of weight leads 8 and ladder (not shown) as is well known to the art. It will be observed that if the divergence of said sills in my structure were continued uniformly from the line CD to the rearward end of the structure, said rearward end would be of very great and unnecessary width, while if said sills converged uniformly from a comparatively narrow rear end of the base, the structure would be too narrow to insure sufficient stability in the vicinity of the shear-leg footings.

What I claim is In a pile driver, the combination of horizontally disposed sills or skids connected together by cross ties mounted thereon, an engine bed mounted upon said ties near the rearward ends of said sills, said sills being approximately parallel with each other from their rearward ends to a line transecting them intermediate of said engine bed and their forward ends, said sills converging toward each other from said transecting line to their forward ends, footings for shear legs mounted upon the cross ties intermediate of said engine base and the forward ends of said sills, the latter said ties eX- tending transversely over and beyond converging portions of said sills and said footings being mounted thereon near the ends thereof outwardly of said sills, shear legs pivotally mounted at their lower ends in said footings and converging upwardly toward each other, and weight or hammer leads mounted upon the forward ends of said sills.

In testimony whereof, I hereunto afliX my signature, in presence of two witnesses.

EDWARD J. STONE. Witnesses R. W. STONE, A. I. STONE.

Washington, D. G. 

